Vacuum cleaner



oct. 27 ,41925. v 1,559,153

v O. BRINTZENHOFE VACUUM'CLEANER Filed Aug. 7. 1922 inventor'. Otto Brintzenhofe,

Patented Oct. 27,1925.

, *UNITED* STATES PATENT OFFICE.-

'Cleveland, in the countyv v oTTo nmmzmmorn' or CLEVELAND, omo, AssIeNdn 'ro ELEcTnIc. VACUUM CLEANER COMPANY, INC., .A CORPORATION OF NEW YORK.

vacux cLmNEn. Application led August y7,

To all whom it may concern.'

Be it known that I, O'rro BRINTzENHoFE, a citi/zen ofthe United States, residing at of Cuyahoga, State of Ohio, have invented certain new and usefuly Improvements in Vacuum Cleaners-0f which the following isa specilic'ation.

The present invention relates to vacuiiuncleaners of the portable type wherein the cleaner is carried on forward lrollel'l lrranged at thel ends of: the nozzle and one or more rear rollers, .and hasvfor its object to provide an improved arrangement for mounting the forward rollers whereby .they may be adjusted to raise and lower the vacuum cleaner nozzle relatively lto the Vwheels to vary the distance between the noz-,

zle and the Hoor.

For a consideration ofA ywhat I believe to be novel and my invention, attention is directed to the accompanying description and the claim appended thereto.

In the drawing, Fig. 1 is a side elevation of a vacuum cleaner embodying my inven' tion; Fig.' 2 is a rearview'threof, and Fig. 3 is a detail sectional view of certain parts.

v I have illustrated -a vacuumcleaner comprising an velectric'motor 5 which drives a suitable fan enclosed ina fan casing Projecting forwardly and laterally of the i face of nozzle 7 an fan casing is the suction nozzle 7 which deines the usualelongated inlet or suction .mouth 8. The cleaner is carried on two for ward wheels 9 arranged a-t the ends of noz-` zle 7 .and am/rear wheel -10 carried by a bracket 1 1 fixed to the motor casing and is propelled over a Hoor by handle -12. The -discharge opening from the fan casin is indicated at 13. The artsso far descrl d may be taken as typica of. any suitable type of portable vacuum cleaner.'

Now, according to my invention I mount the forward wheels 9 n a frame comprising a" transverse or side member 14 and end members 15. The transverse orside 'member 14 extends alon the outer'rear surthe end members 15 extend forwardly and at a right angle from it alongtlie outer surfaces of the end wallsy "of nozzle 7. At their extremities end members 15 are pivoted to the end walls of nozzle 7 and adjacent their vforward edges as indicated at 16. The frame is'formed preferably from an -integral strip of material whee detract' from 1922. serial No. 579,977. i

to form end members 15. End members 15 are curved upwardly so as to Ibring thc centers of'wheels' 9 the required vdistance above the suction mouth of the nozzle. The

may be pivoted to the frame ends in any suitable manner. 'p Inl the presenty instance threaded studs 17 are riveted to end members 15' and on these are threaded xed. hubs 18 on.which wheels 9 turn.

On the rear wall of nozzle 7 'is a boss 19 provided w1 h a tapped opening 20- in which 1s mounted a frame adjusting bolt'21 having a'knurled head 22 at one lend and 'a groove 23 at the other end. Riveted to 70 frame `member 14 is an angle piece 2st having a slotgwhich forms furcations 25 which lie in groove 23 to fasten bolt 21 to the frame. This arrangement serves to pivot ,ally connect bolt 21 to the frame and it 75 will be clear that when the bolt is turned the rear end of the frame will be raised or lowered, turning on pivots 16, thereby raising or lowering wheels 9. When wheels 9 are lowered ,the suction mouth of nozzle 7 is' raised or moved awayfrom the floor and when Wheels 9 arel raised the suction mouth isy lowered or moved toward the floor. In Fig. 3y the holes 26areI those in which bearings fon af brush (not shown) are mounted, the brush bein .rotatably mounted in the suction nozzle v In order to prevent adjustingv bolt'21 from turning Itoo easily I provide a vsocket 27 in whichis located a button 28 which'is D.

ressed against bolt 21 by a spring 29, the utton thus serving as a sort of brake. At 30 is la'pin which forms a stop for limiting the adustment of the nozzle toward the floor, t e pin* being preferably so set that 0I the nozzle cannot be lowered beyond the bottoms of the wheels. l f

With the above described arran ement, .the frame is located at the rear of t e noz-- zle where it is out' of the -way and does not l.

I -the appearance of the front of the cleaner. The end members 15 are piv oted well toward the front edge of the nozzle to provide a leverage sufficiently great to give the Vdesired frange of adjustment l10| forthe'whe'els. Since the frame is outside the nozzle it doesnot in any way interfere .with the passage of the dust laden air through the nozzle orwith the o eration of the brush Vwhich is usually provided in the ll.

'justs both wheels simultaneously Abut I desire nozzle; also the wheel bearing being out of the path of the dust laden air will not become clogged with dirt. Theadjusting means is simplefto lo erate and since it adand b exactly the sane amount, the nozzle wil always stand parallel to the lfloor. In accordance with the provisions of the patent statutes, I have described the principle of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof, to have it' understood that the apparatus shown is only illustrative and that the invention may be carried out by other means.

What I claim as new and desire to secure by Letters Patent of the United States, is

1. The combination with a vacuum cleaner having a suction nozzle with front, rear and end walls, of means for supporting the nozzle in adjustable spacedrelation to a surface over which said nozzle is operated, said means being located exteriorly of the nozzle and comprising ing a transverse portion which extends along and closely adjacent the rear wall of the nozzle and end l ortions which extend forwardly along and) closely adjacent the end wallsof the nozzle, said frame being pivoted at its ends to the end walls of the a frame member havv nozzle adjacent ythe walls, a traction wheel at each end of the nozzle rotatably mounted on the frame end portions in coaxial relation to each other, a lug integral with and projecting rearwardly of the nozzle above the frame, an adjusting bolt carried by said lug and pivot-ally connected to the frame.

2. having and end walls, of a U-shaped frame closely embracing the nozzle from the rear end and pi-votally movable about its ends, said ends of the frame being pivoted to the end walls of the nozzleadjacent the front edges of said end walls, traction wheels mounted on the frame in alignment'with the nozzle at each end thereof, said traction wheels being movable vwith the frame whereby they are adjusted by moving the frame, a lug integral with and projecting rearwardly of and l The combination with a vacuum cleaner' a suction nozzle with front, rear front edges of saidthe nozzle above the. frame, an adjusting bolt for moving the frame* and holding the same in adjustment carried by said lug and pivotally connected with the frame, and automatic means for holding the bolt from movement when the frame is adjusted.

In witness whereof I have hereunto set my hand this first dayl of August, 1922.

oTTo BRINTZENHOFE. 

